CeramicSpeed OSPW X Pulley Wheel System for Shimano GRX/RX 2x11 - Coated Races Alloy Pulley Carbon Cage Black. The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-fr
CeramicSpeed OSPW X Pulley Wheel System for Shimano GRX/RX 2×11 – Coated Races Alloy Pulley Carbon Cage Black. The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.
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